Re: Logical Replication of sequences

From: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
To: vignesh C <vignesh21(at)gmail(dot)com>
Cc: shveta malik <shveta(dot)malik(at)gmail(dot)com>, Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com>, Peter Eisentraut <peter(at)eisentraut(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Euler Taveira <euler(at)eulerto(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>
Subject: Re: Logical Replication of sequences
Date: 2025-07-21 05:45:33
Message-ID: CAFiTN-ucHoxLRFxyavhTv_fpTyBpeNHAAzNtSSM=m6-MdhN-GA@mail.gmail.com
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On Mon, Jul 21, 2025 at 10:36 AM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
>
> I was just trying a different test, so I realized that ALTER
> PUBLICATION ADD SEQUENCE is not supported, any reason for the same?
>
> postgres[154731]=# ALTER PUBLICATION pub ADD sequence s1;
> ERROR: 42601: invalid publication object list
> LINE 1: ALTER PUBLICATION pub ADD sequence s1;
> DETAIL: One of TABLE or TABLES IN SCHEMA must be specified before a
> standalone table or schema name.
> LOCATION: preprocess_pubobj_list, gram.y:19685
>
Also I noticed that
1. We don't allow creating publication with individual sequences (e.g.
CREATE PUBLICATION pub FOR SEQUENCE s1;). Is it because the main
purpose of this sync is major version upgrade and we do not have
scenarios for replicating a few sequences or there are some technical
difficulties in achieving that or both.

2. This syntax works (CREATE PUBLICATION pub FOR ALL TABLES,
SEQUENCES;) but tab completion doesn't suggest this

3. Some of the syntaxes works for sequence which doesn't make sense to
me, as listed below, I think there are more

postgres[154731]=# CREATE PUBLICATION insert_only FOR ALL SEQUENCES
WITH (publish = 'insert');
CREATE PUBLICATION

postgres[154731]=# CREATE PUBLICATION pub FOR ALL SEQUENCES WITH (
PUBLISH_VIA_PARTITION_ROOT );
CREATE PUBLICATION

--
Regards,
Dilip Kumar
Google

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